Many mentioned the impact tech and Silicon Valley was having on their business and Wall Street at large.

On one hand, platforms like LinkedIn have encroached on their turf.

But many have also noticed top candidates flocking to tech companies instead of investment firms.

Business Insider recently compiled a list of the top headhunters on Wall Street age 40 and under, and in the process we asked many of the candidates the same question: What's your biggest concern about the industry?

One theme came up over and over again, and it's a concern that'll be familiar to many: How Silicon Valley is changing their business.

They went on to explain that, for example, LinkedIn's arrival had significantly impacted their many-decades old business, especially for recruiting mid-level finance positions that earn below $225,000.

"LinkedIn has been devastating to that mid-level," they said, adding that they anticipate more technology platforms to exacerbate the problem going forward. "It's not about if, it's about when."